## ISO_31-11

TIL ISO 31-11 exists. Came across the wiki page when googling the notations for open and closed intervals (which I can never seem to remember).

As a further reminder:

[a, b]


denotes the closed interval (closed to adding endpoints) which includes endpoints a and b.

(a, b)


denotes the oepn interval (open to adding endpoints) which excludes endpoints a and b.